If you are studying bio/human physio for a course, then it is best to get guidance from the prof or someone who took the course last year. But if you are talking about the GAMSAT then I'll give you my biased view. There is one book that has all the content in it and you don't need to blindly trust any anonymous post; there are 4 bookstores in Sydney (I'm presuming that's where you are from) where you can pick up the book, flip through it and see if it is true.